35 Open source projects that are alternatives of or similar to Focus

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pure functional and generic programming for Erlang

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Lenses.io CLI (command-line interface)

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Scala Exercises for the Scala Optics library Monocle http://julien-truffaut.github.io/Monocle/

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(Yet another) implementation of functional lenses in JavaScript/TypeScript.

Functional references for Clojure and ClojureScript

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A lightweight (but compatible with ‘lens’) lenses library